Update dependency markdown-it to v12.0.5

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
markdown-it	12.0.4 -> 12.0.5

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Release Notes

markdown-it/markdown-it

### [`v12.0.5`](https://togithub.com/markdown-it/markdown-it/blob/master/CHANGELOG.md#​1205---2021-04-15) [Compare Source](https://togithub.com/markdown-it/markdown-it/compare/12.0.4...12.0.5) ##### Fixed - HTML block tags with `===` inside are no longer incorrectly interpreted as headers, [#​772](https://togithub.com/markdown-it/markdown-it/issues/772). - Fix table/list parsing ambiguity, [#​767](https://togithub.com/markdown-it/markdown-it/issues/767).

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